| 词汇 | second nature |
| 释义 | second na·ture /ˌ·· ˈ··/n [u]something you have done so often that you do it almost without thinking 第二天性，习惯:◇wearing a seatbelt is second nature to most drivers. 对大多数司机来说，系安全带已经成为一种习惯。 |
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